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In the Forum: Audio Discussions
In the Thread: First Order on Bass channels: Designed for Sound
Post Subject: 1.5 order how to?Posted by stuck.wilson on: 7/20/2007
hm..

lots of interesting information to chew on, and by and large, i've had similar experiences with first order crossovers on bass drivers .. this being my experience with a full range amp, and a two way system-- which is a far different critter than your own, for certain.

regardless though--   i do have a question about implementing the '1.5 order' crossover... how would one implement such a thing?   having seen the benefits of first orders in my own application tonally AND dynamically, but having to settle for an asymmetrical 2nd order (first order on the horns) to deal with acoustic phase (WAF, as well as percariously perched horns with first orders, and cats who don't take the hint not to look for the higher vantage points... including my speakers!)-- the idea of something besides a 2nd order sounds appealing..  what would be the phase 'offset', so to speak?  is there a difference from the traditional 45 degree shift?   is it just, say, a 2 mH and a 1.5mH inductor, where before it would be a 3.5?  sorry for the silly question-- but that's definitely not something i've seen outside my own mixing of inductors because i didn't have the right values!

also-  the higher DCR of the filter configured this way-- especially in the mids-- can do some damage to efficiency numbers and transients, wouldn't it?  i have noticed a significant slowing down of transients with air cores that i don't have as much of an issue with inductors like madisound sledgehammers (which are laminate iron cores).  any thoughts?  i know there's definitely a traditional bias against iron cores-- but i've definitely appreciated the 'lessening of the reins' below 1k!

i realize it's not your optimal-- but in such a compromised sitch as a 2 way,  with the 'narrow bandwidth lack of linearity' at 1k, would you think that could be a rectifiable situation-- or would y' think that you just deal with the compromises of the flat response and second order?

many thanks!

d.

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